/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard;

import java.io.*;

/**
 * A <code>WordReader</code> that returns words from a line number reader.
 *
 * @author Eric Lafortune
 */
public class LineWordReader extends WordReader {
    private final LineNumberReader reader;
    private final String description;

    /**
     * Creates a new LineWordReader for the given input.
     */
    public LineWordReader(LineNumberReader lineNumberReader, String description, File baseDir) throws IOException {
        super(baseDir);

        this.reader = lineNumberReader;
        this.description = description;
    }

    // Implementations for WordReader.

    protected String nextLine() throws IOException {
        return reader.readLine();
    }

    protected String lineLocationDescription() {
        return "line " + reader.getLineNumber() + " of " + description;
    }

    public void close() throws IOException {
        super.close();

        if (reader != null) {
            reader.close();
        }
    }
}
